Beam management in cellular communication networks

Abstract

According to an example aspect of the present invention, there is provided a method comprising, determining at least one anchor control resource set among a plurality of control resource sets, wherein each of the at least one anchor control resource set defines a spatial source for multiple signal types, said multiple signal types comprising different downlink and uplink signals and channels, determining whether or not a given signal type is to inherit a spatial source of one of the at least one anchor control resource set and applying, in case of a positive determination, the spatial source of the at least one anchor control resource set for at least one signal of the given signal type.

The invention claimed is: 
     
       1. An apparatus comprising:
 at least one processing core; 
 at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to perform:
 determine at least one anchor control resource set among a plurality of control resource sets, wherein each of the at least one anchor control resource set defines a spatial source for multiple signal types, said multiple signal types comprising different downlink and uplink signals and channels, wherein the at least one anchor control resource set is a control resource set of a serving cell and the apparatus is configured with an additional anchor control resource set of a non-serving cell, a priority of the additional anchor control resource set of the non-serving cell being less than a highest priority anchor control resource set of the serving cell but higher than a priority of any other anchor control resource set, and wherein multiple control resource sets are grouped in multiple groups with each group in the multiple groups being associated with a different transmission and reception point, and one control resource set in each of the multiple groups is assigned as an anchor control resource set for a group and other control resource sets in the group inherit the spatial source from the assigned anchor control resource set of the group; 
 activate the additional anchor control resource set of a non-serving cell based on an activation command received from the non-serving cell; 
 determine that a given signal type is to inherit a spatial source of one of the at least one anchor control resource set, wherein only a subset of all signal types inherits the spatial source of the at least one anchor control resource set; and 
 apply the spatial source of the at least one anchor control resource set for at least one signal of the given signal type. 
 
 
     
     
       2. The apparatus according to  claim 1 , wherein the spatial source of said one of the at least one anchor control resource set defines a transmission configuration indication state for the given signal type. 
     
     
       3. The apparatus according to  claim 2 , wherein the spatial source of said one of the at least one anchor control resource set is applied regardless of a scheduling offset when the apparatus is configured and activated with the at least one anchor control resource set. 
     
     
       4. The apparatus according to  claim 2 , wherein the spatial source of said one of the at least one anchor control resource set is applied regardless of whether said one of the at least one anchor control resource set is a control resource set with a lowest identity. 
     
     
       5. The apparatus according to  claim 4 , wherein the at least one anchor control resource set comprises only one anchor control resource set and the spatial source of said one anchor control resource set is a single spatial source for said multiple signal types. 
     
     
       6. The apparatus according to  claim 5 , wherein the at least one anchor control resource set comprises multiple anchor control resource sets in one cell, said multiple anchor control resource sets having different priorities. 
     
     
       7. The apparatus according to  claim 6 , wherein a control resource set number zero has a highest priority. 
     
     
       8. The apparatus according to  claim 7 , wherein the apparatus is a user equipment or a mobile termination part of a relay, or a control device configured to control a functioning thereof. 
     
     
       9. A system comprising:
 an apparatus; 
 at least one processor; 
 at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing, cause the apparatus at least to perform:
 determine at least one anchor control resource set among a plurality of control resource sets, wherein each of the at least one anchor control resource set defines a spatial source for multiple signal types, said multiple signal types comprising different downlink and uplink signals and channels, wherein the at least one anchor control resource set is a control resource set of a serving cell and the apparatus is configured with an additional anchor control resource set of a non-serving cell, a priority of the additional anchor control resource set of the non-serving cell being less than a highest priority anchor control resource set of the serving cell but higher than a priority of any other anchor control resource set, and wherein multiple control resource sets are grouped in multiple groups with each group in the multiple groups being associated with a different transmission and reception point, and one control resource set in each of the multiple groups is assigned as an anchor control resource set for a group and other control resource sets in the group inherit the spatial source from the assigned anchor control resource set of the group; 
 activate the additional anchor control resource set of a non-serving cell based on an activation command received from the non-serving cell; 
 determine that a given signal type is to inherit a spatial source of one of the at least one anchor control resource set, wherein only a subset of all signal types inherits the spatial source of the at least one anchor control resource set; and 
 apply the spatial source of the at least one anchor control resource set for at least one signal of the given signal type. 
 
 
     
     
       10. A method comprising:
 determining, by an apparatus, at least one anchor control resource set among a plurality of control resource sets, wherein each of the at least one anchor control resource set defines a spatial source for multiple signal types, said multiple signal types comprising different downlink and uplink signals and channels, wherein the at least one anchor control resource set is a control resource set of a serving cell and the apparatus is configured with an additional anchor control resource set of a non-serving cell, a priority of the additional anchor control resource set of the non-serving cell being less than a highest priority anchor control resource set of the serving cell but higher than a priority of any other anchor control resource set, and wherein multiple control resource sets are grouped in multiple groups with each group in the multiple groups being associated with a different transmission and reception point, and one control resource set in each of the multiple groups is assigned as an anchor control resource set for a group and other control resource sets in the group inherit the spatial source from the assigned anchor control resource set of the group; 
 activating, by the apparatus, the additional anchor control resource set of a non-serving cell based on an activation command received from the non-serving cell; 
 determining, by the apparatus, that a given signal type is to inherit a spatial source of one of the at least one anchor control resource set, wherein only a subset of all signal types inherits the spatial source of the at least one anchor control resource set; and 
 applying, by the apparatus, the spatial source of the at least one anchor control resource set for at least one signal of the given signal type.